MORE THAN 40,000 YEARS AGO a sub-species humanoid lived in Siberia. DNA analysis shows that they are a distinct species from the Neanderthal and modern human. Denisova Cave in SIberia housed extinct breeds of humanoids, including both of the above.
In late 2013 a new study was revealed to the Royal Society in London, In the examination of the DNA of a finger fragment found in the cave, they found that one section of the genome seemed to come from a previously unknown species. The same genetic results were confirmed in two teeth found on the site.
As yet, who preceded these extinct species is a great mystery.
How long have intelligent humanoids lived on Earth? It is a question that is less solved than we thought. Perhaps even a million years? More?

Tourists in front of the Denisova Cave, where “X woman” was found
Further reading:
http://en.wikipedia.org/wiki/Denisovan
http://www.nature.com/news/mystery-humans-spiced-up-ancients-sex-lives-1.14196
http://www.newscientist.com/article/dn24603-mystery-human-species-emerges-from-denisovan-genome.html#.VO9hLLPF_xL
Kenneth Harper Finton 
This was bound to happen.
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Yes, it was bound to happen. What the discovery shows is that there are many races of humans who obviously had a long evolutionary journey far before the types known to us.
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Wonder what they’ll say about us down the road if it comes to that. Think of the theories if they dig up Disney World!
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